Informants can greatly aid U.S. authorities but still face deportation
"For about $10,000 a year, he risked his life time and again, according to those who worked with him. Undercover detectives came to trust him with their own lives. When his work was done, he faced another peril: deportation. His is among at least a dozen cases in which informants say they've been led to believe that federal agencies would help them get U.S. residency in exchange for their assistance in undercover investigations, only to have the implied or explicit promises broken, an inquiry by the Los Angeles Times and the Center for Investigative Reporting found." LA Times, Feb. 12, 2010.